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Rollup merge of #121122 - compiler-errors:identical-layouts, r=oli-obk

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Enforce coroutine-closure layouts are identical

Enforce that for an async closure, the by-ref and by-move coroutine layouts are identical. This is just a sanity check to make sure that optimizations aren't doing anything fishy.

r? oli-obk
This commit is contained in:
Matthias Krüger 2024-02-15 09:20:23 +01:00 • committed by GitHub
commit 829b59a47d
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2 changed files with 24 additions and 2 deletions
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6
compiler/rustc_middle/src/mir/query.rs
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@ -86,7 +86,8 @@ rustc_index::newtype_index! {
pub struct CoroutineSavedLocal {}
}
#[derive(Clone, Debug, TyEncodable, TyDecodable, HashStable, TypeFoldable, TypeVisitable)]
#[derive(Clone, Debug, PartialEq, Eq)]
#[derive(TyEncodable, TyDecodable, HashStable, TypeFoldable, TypeVisitable)]
pub struct CoroutineSavedTy<'tcx> {
pub ty: Ty<'tcx>,
/// Source info corresponding to the local in the original MIR body.
@ -96,7 +97,8 @@ pub struct CoroutineSavedTy<'tcx> {
}
/// The layout of coroutine state.
#[derive(Clone, TyEncodable, TyDecodable, HashStable, TypeFoldable, TypeVisitable)]
#[derive(Clone, PartialEq, Eq)]
#[derive(TyEncodable, TyDecodable, HashStable, TypeFoldable, TypeVisitable)]
pub struct CoroutineLayout<'tcx> {
/// The type of every local stored inside the coroutine.
pub field_tys: IndexVec<CoroutineSavedLocal, CoroutineSavedTy<'tcx>>,